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PLANT SCIENCE 221 PRE QUESTIONS WITH CORRECT ANSWERS

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PLANT SCIENCE 221 PRE QUESTIONS WITH CORRECT ANSWERS

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region of cell maturation


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where primary root tissue mature into secondary root tissues. root cells are
formed here.




How does water travel vertically and laterally between adjacent vessel elements?

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Water travels vertically through vessel elements in an uninterrupted fashion,
while it travels laterally through pit pairs.




protected meristem


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the apical meristem of a monocot. it is enclosed by leaf sheaths on either
side.




How does water travel vertically and laterally between adjacent tracheids?


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Water within tracheids travels both vertically and laterally through pit pairs




How do Mycorrhizae Fungi form mutually beneficial associations with plants?


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Mycorrhizae Fungi generally extend the environment from which plant
roots can draw water and nutrients from, and most importantly, help plants
absorb phosphorous? In return, plants give mycorrhizae fungi sugars and
amino acids, which are relatively inexpensive for the plant to expend.

, amyloplasts


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densely packed plastids that store sugar and starch




In shoots, what meristematic component produces both the xylem and phloem?


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the procambium




Where do the light reactions of photosynthesis occur?


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the thylakoid membrane




What component do plant root nodules produce that allows nitrogenases in
Rhizobium bacteria to fix nitrogen? What does this component do?


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Leghemoglobin. Leghemoglobin bonds to oxygen 10x greater than
hemoglobin in our blood, meaning that it Leghemoglobin in root nodules
provides a low oxygen environment for nitrogenases to work in, as
nitrogenases function best in these low oxygen environments. Some

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